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PATENTED JAN. 26, 1904.

L. CHAPMAN.

LUBRICATOR.

APPLICATION FILED NOV. 10, 1902.

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No. 750,751. 'PATENTED JAN. 26, 1904.

L. CHAPMAN. LUBRIGATOR.

APPLICATION FILED NOV. 10, 1902. H0 IODEL. 4 SHEETS-SHEET 2.

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PATENTE-D JAN. 26, 1904.

L. CHAPMAN.

LUBRICATOR.

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L. CHAPMAN, LUBRI GATOR, APPLICATION FILED NOV. 10, 1902.

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umouw UNITED STATES Patented January 26, 1904.

PATENT OFFICE.

LEONARD CHAPMAN, OF LONDON, ENGLAND, ASSIGNOR OF ONE-HALF TO WILLIAM HUMPHREY KNOl/VLES, OF LONDON, ENGLAND.

LUBRICATOR.

SPECIFICATION forming part of Letters Patent No. 750,751, dated. January 26, 1904.. Application filed November 10, 1962:. Serial No. 130,786. (No model.)

To (LZZ whom, it flirty concern:

Be it known that I, LEONARD CHAPMAN, a subject of His Majesty the King of Great Britain, residing at London, England, have invented a certain new and useful Improvement in Lubricators, of which the following is a specification.

My invention relates to an improvement in lubricators, the object being to provide a lubricator better adapted for feeding semisolid or thick lubricating material, particularly graphite and oil or the like, where either the graphite has a tendency to settle down from the oil in which it is in suspension or where it is such a pasty or sticky body that it is diflicult to fill into the lubricator through the small openings usually provided for the purpose.

' My invention is illustrated in the accompanying drawings, in which Figure 1 is a sectional elevation of one form of the lubricator. Fig. 2 is a plan. Fig. 3 is an elevation, partly in section, with the parts in a difi'erent position. Fig. 4c is a sectional elevation, on an enlarged scale, of the lower part of the lubricator to show a modification.

Referring to the arrangement shown in Figs. 1 to 3, it will be seen that the lubricator consists of a cylinder 1 for holding the lubricant, having at its upper end a nut 3, internally threaded and prevented from rising by a cap 2, internally threaded, which engages with an external thread on the upper part of the cylinder and which cap holds down an enlarged part or flange of the nut. The nut is in the form of a long sleeve and engages an externally-threaded trunk 5,grooved with a featherway 6, which engages a feather 7, secured in the boss of a ratchet-wheel 8, which is not threaded, and therefore does not prevent the trunk 5 from moving vertically. Secured to the exterior of nut 3, either by screwing at the point 9 or in other ways, is a second ratchet-wheel A, which has a greater number of teeth than ratchet-wheel 8. The trunk 5 forms at its upper end a funnel-shaped handwheel 9, and at its lower end it has attached to it by screwing or otherwise a block 14, having a tubular extension 15, which passes vided with a long handle 21.

' ing devices) and terminates in an arm 17, which also serves as a nut for the piston-packing and which is securely locked to the tube 15, so that it will rotate therewith. The interior joint is also packed by the cup-leather 16. Between this block 14 and the upper side of piston is a ball-bearing, preferably formed of a number of balls carried by a cage 18. The passage 19 of the part 15 forms a communication between the interior of trunk 5 and of cylinder 1 and is closed by a screw-plug 20, pro- Secured to the arm 17 by a pin or stud 22 is a flat helical spring 23, fitting approximately the bore of the cylinder when compressed and abutting against a plug 24:, Which closes the cylinder, the outlet of which is shown at 25, Fig. 3.

The driving device for the ratchet-wheel consists of arms 26 26, mounted so as to rotate freely on the nut 3 and a boss of the ratchetwheel 8, respectively. These arms are connected by a pin 27, secured to them by suitable nuts, and which carries a Wide pawl 28, capable of engaging both wheels 8 and 4 simultaneously. To give the requisite spring action to the pawl, it is pressed onto the wheels by a flat spring 29, pressed against a flat surface 70 of pin 27 at one end and secured to the pawl by screws 30 30 at the other. The arms are further connected by a stud 31, riveted to one of them and secured to the other by a nut, which stud in its central portion forms the ball portion 32 of a ball-and-socket joint, the joint being composed otherwise in part of a washer 33, suitably recessed for the ball, and a nut 34 on the end of an arm 35, a reduced part of which passes through an opening of large size in the ball, so that the latter may adjust itself therein. The arm 35 carries a correspondingly-recessed part 36, be tween which and the washer 33 the ball is held by the nut. The arm 35 at the other end carries asimilar ball-andsocket joint, the ball 37 of which is carried by an arm 38, having an eccentric-strap engaging the eccentric 39 on a shaft 10. Fixed to the cylinder 1 at 41 is a plate 42, having a slot 43, in which is held by a screw 44, engaging with a nut 73 and having a handle 45, a block 46, carried on the screw by the sleeve 71, forming part of a block 7 2. Through this. block 46 passes the arm 38, the arrangement enabling the block 46, which forms a fulcrum for the arm 38, to be raised or lowered, so that the throw of arm 38 can be adjusted, such throw or rocking movement of the arm being obtained from the eccentric 39 of the shaft 40, which is rotated by any convenient means. The rocking movement of the arm 38 will, through the pawl 28, impart movement to the ratchet-wheels. If both of these, however, had the same number of teeth, both the screwed trunk 5 and the nut 3, which it engages, would be rotated as one, together with the helical screw 23, which acts as a stirrer, and although the contents of cylinder 1 would be kept constantly agitated by the stirrer and settling of the contents prevented no vertical motion would be imparted to the piston to extrude the contents of the lubricator. This, however, is obtained by the arrangement by which the ratchet wheel 8, which turns trunk 5, is provided with fewer teeth than wheel 4, which rotates nut 3, so that trunk 5 revolves faster than nut 3 and screws the piston slowly down. As the piston descends the pitch of the helical stirrer becomes gradually less, and at the end of the pistons travel the latter is compressed, as shown. The downward travel of the piston, and consequently the compression of the helical stirrer, is arrested upon a shoulder 47 under the hand-wheel 9 coming in contact with the boss of the ratchet-wheel 8, which is thus locked between the shoulder 47 and the more slowly moving nut 3, upon which the ratchetwheel 8 bears, with the result that both then rotate together at the higher speed of wheel 8 and further vertical motion and consequent damage to the part is arrested.

Although the stirring arrangement prevents settlement of the finely-divided solid lubricant in the cylinder, a deposit may take place in the pipe leading from the lubricator, and to prevent this the arrangement shown in Fig. 4 may in addition be employed. This consists of a spiral wire 49, secured in the passage 19 of the part 15 and passing through and guided by an outlet-passage in a closing-block 50 of the cylinder 1, to which block is attached a delivery-pipe 52 by a cone-joint 51, provided with a screwed cap 53 for securing it to the part 50. This Wire forms a spiral of opposite hand to that of the helical stirrer 23,

with which, as will be seen, it rotates, for the reason that the latter has to raise the sediment from the cylinder-bottom, whereas the object of the wire 49 is to scrape the deposit from the inner surface of the outlet passage and pipe and at the same time to propel it forward. The wire, as will be seen, can also yield to the longitudinal movement of the part 5.

What I claim is 1. In a lubricator, the combination with a closed receptacle for the lubricant, of a piston and means including a part movable rotatively and longitudinally for applying pressure to extrude the lubricant, such means including also a pair of ratchet-wheels, one having a greater number of teeth than the other, a pawl for driving said wheels, means for giving motion to the pawl, means whereby the movable pair of ratchet-wheels one having a greater number of teeth than the other, a movable externally-screwed part to which one of same is secured with provision for longitudinal movement, a rotatable nut engaging said externally-screwed part, and to which the second ratchet-wheel is secured, means for holding the nut against longitudinal movement, a part carried by the nut on which the first ratchet-wheel abuts, a part carried by the movable part adapted to abut on the other side of said ratchet-wheel, and means for rotating both ratchet-wheels whereby two motions are obtained for the movable part, until its limit of longitudinal movement is reached, when all the parts will receive movement of rotation only.

3. In a lubricator, the combination with a pair of differential ratchet-wheels, a movable part, and means connecting the three, whereby the movable part is both rotated and moved longitudinally, of a pawl, means for carrying same, an arm connected at one end to such means, an eccentric connected to the other end of such arm, means for carrying and rotating the eccentric, and a fulcrum for the arm and means for adjusting the position of said fulcrum whereby the throw of the pawl can be varied.

4. In a lubricator, and in combination, a receptacle for the lubricant, a piston therein and a piston-rod therefor, means for imparting both a rotating and a longitudinal movement to the piston-rod, and a compressible stirrer carried by said piston-rod and rotatable therewith.

5. In a lubricator, and in combination, a receptacle for the lubricant, a piston and pistonrod therein, means for imparting both a rotating and longitudinal movement to the lat ter, and a helical-spring stirrer carried by said piston-rod and rotatable therewith.

6. In a lubricator, the combination with a receptacle for the lubricant having a feed-outlet, of a piston having an opening therethrough, a tubular part 15 to admit the lubricant to the receptacle passing through said opening and rotatable therein, an externallyscrewed trunk portion 5 forming a tubular piston-rod attached to said part 15, means for rotating and traversing said trunk portion and tubular part whereby the piston may be traversed without rotation, and means for closing the opening of the tubular part leading to the receptacle.

7. In a lubricator, the combination with a receptacle for the lubricant of a trunk portion forming a piston-rod, a part 15 carried by said trunk portion having a filling-passage therethrough, a plug for closing said passage, a piston surrounding said part, and in which the latter is free to rotate, a cup-leather carried by said piston, means carried by the part 15 for holding the cup-leather to the piston, and means for rotating the trunk and moving same longitudinally.

8. In a lubricator, and in combination, a receptacle for the lubricant having a feed-outlet, a trunk portion in said receptacle having an exterior screw,a ratchetwheel,a nut driven by same, and engaging said trunk for giving the latter a longitudinal movement by means of said screw, means for driving the ratchetwheel, a piston having an opening therethrough, a tubular part carried by the trunk to admit the lubricant and passing through the opening in the piston in such a manner that it may revolve therein, means for retaining said tubular part in the piston, and means for closing the opening of .the tubular part.

9. In a lubricator, and in combination a cylinder 1, an open trunk portion 5 in the same, means for imparting a rotary and a longitu- I dinal movement to same, a tubular extension 15 carried by the trunk, a plug for closing the opening in said extension, a piston through which such extension passes and in which it can rotate, and a stirring device carried by said extension and capable of being rotated with it.

10. In a lubricator, the combination with a receptacle for the lubricant, a piston therein, a part carrying said piston, and passing through same, means for imparting both a rotating and a longitudinal movement to said part, a stirring device in said receptacle, means for connecting it to the rotating part carrying the piston, an outlet-pipe for said lubricator, a flexible spiral wire in said pipe, and means connecting said spiral wire to the rotating part carrying the piston whereby said wire is rotated to propel the lubricant through the pipe and prevent it from settling.

11. In a lubricato'r the combination with a cylinder 1, a delivery-pipe connected thereto, an open trunk portion 5 located in the cylinder, means for imparting a rotary and longitudinal movement to same, a tubular extension 15 carried by the trunk, a piston carried by said tubular extension, a plug for closing the opening in said extension, a helical stirring device 23 carried by such extension, and a spiral wire 49 also carried by said extension and located in the discharge-pipe.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

LEONARD CHAPMAN. Witnesses:

ARTHUR NIBLooK,

WALTER E. RocHE. 

